Really??? This bug has been confirmed by 86 users, me and other users asked you for many times.
Come on!! Are you playing with us? More than 2 months with this annoying bug, I sent you the link and you only ask which issue is?? We are waiting for a long time, lot of rom versions have been published and the bug is still there.

Hey MODERATORS and DEVELOPERS, are you kidding us? Is this the right way to treat your clients? Will you ever fix this network problem? Can it be fixed? Will you give us a STRAIGHT ANSWER after all this time? Stop ignoring and disrespecting us. That's totally frustrating.

I have tried Chinese Beta as well as Stable ROMs both the ROMs show VoLTE.

I have also flashed China beta ROM and then flashed 8.0.3 through EDL mode, however, VoLTE issue remains unresolved. Kindly look in to bugs introduced since release of 7.5.8 onwards to resolve the issue.
I don't understand that what was the hurry to release Global stable when may users reported VoLTE BUG remaining.